Hi Antkn33,
Thanks for your bug report.
Gave the issue a short repro with Cubasis 2.4 on an iPad.
Things work as expected here, part changes have properly recorded within the MIDI event.
Did you check to de-activate the Rozeta XOX plug-in after recording it to a new MIDI event?
If so, please open the MIDI effects tab and tap the on/off button to set XOX to off.
Hope that helps.
Best wishes,
Lars